/*
 * A V4L2 driver for IMX219 cameras.
 *
 */
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/videodev2.h>
#include <linux/clk.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-mediabus.h>
#include <linux/io.h>
#include "camera.h"
#include "sensor_helper.h"

MODULE_AUTHOR("Chomoly");
MODULE_DESCRIPTION("A low-level driver for IMX219 sensors");
MODULE_LICENSE("GPL");

//for internel driver debug
#define DEV_DBG_EN      0 
#if(DEV_DBG_EN == 1)    
#define vfe_dev_dbg(x,arg...) printk("[IMX219]"x,##arg)
#else
#define vfe_dev_dbg(x,arg...) 
#endif
#define vfe_dev_err(x,arg...) printk("[IMX219]"x,##arg)
#define vfe_dev_print(x,arg...) printk("[IMX219]"x,##arg)

#define LOG_ERR_RET(x)  { \
                          int ret;  \
                          ret = x; \
                          if(ret < 0) {\
                            vfe_dev_err("error at %s\n",__func__);  \
                            return ret; \
                          } \
                        }

//define module timing
#define MCLK              (24*1000*1000)
#define VREF_POL          V4L2_MBUS_VSYNC_ACTIVE_LOW
#define HREF_POL          V4L2_MBUS_HSYNC_ACTIVE_HIGH
#define CLK_POL           V4L2_MBUS_PCLK_SAMPLE_RISING
#define V4L2_IDENT_SENSOR 0x0219


/*
 * Our nominal (default) frame rate.
 */
#ifdef FPGA
#define SENSOR_FRAME_RATE 15
#else
#define SENSOR_FRAME_RATE 30
#endif

/*
 * The IMX219 sits on i2c with ID 0x6c
 */
#define I2C_ADDR 0x20
#define SENSOR_NAME "imx219"
int imx219_sensor_vts;
#define ES_GAIN(a,b,c) ((unsigned short)(a*160)<(c*10) && (c*10)<=(unsigned short)(b*160))



//static struct delayed_work sensor_s_ae_ratio_work;
static struct v4l2_subdev *glb_sd;

/*
 * Information we maintain about a known sensor.
 */
struct sensor_format_struct;  /* coming later */

struct cfg_array { /* coming later */
  struct regval_list * regs;
  int size;
};

static inline struct sensor_info *to_state(struct v4l2_subdev *sd)
{
  return container_of(sd, struct sensor_info, sd);
}


/*
 * The default register settings
 *
 */


static struct regval_list sensor_default_regs[] = {/*3280 x 2464_20fps 4lanes 720Mbps/lane*/

};

//for capture                                                                         
static struct regval_list sensor_hxga_regs[] = { //3280 * 2464 20fps 4lane
	
	{0x30EB, 0x05},
	{0x30EB, 0x0C},
	{0x300A, 0xFF},
	{0x300B, 0xFF},
	{0x30EB, 0x05},
	{0x30EB, 0x09},
	{0x0114, 0x03},
	{0x0128, 0x00},
	{0x012A, 0x18},
	{0x012B, 0x00},


	{0x0160 ,0x0F },
	{0x0161 ,0xC5 },
	{0x0162 ,0x0D },
	{0x0163 ,0x78 },

	{0x0164, 0x00},
	{0x0165, 0x00},
	{0x0166, 0x0C},
	{0x0167, 0xCF},
	{0x0168, 0x00},
	{0x0169, 0x00},
	{0x016A, 0x09},
	{0x016B, 0x9F},
	{0x016C, 0x0C},
	{0x016D, 0xD0},
	{0x016E, 0x09},
	{0x016F, 0xA0},
	{0x0170, 0x01},
	{0x0171, 0x01},
	{0x0174, 0x00},
	{0x0175, 0x00},
	{0x018C, 0x0A},
	{0x018D, 0x0A},
	{0x0301, 0x05},
	{0x0303, 0x01},
	{0x0304, 0x03},
	{0x0305, 0x03},
	{0x0306, 0x00},
	{0x0307, 0x57},
	{0x0309, 0x0A},
	{0x030B, 0x01},
	{0x030C, 0x00},
	{0x030D, 0x5A},
	{0x4767, 0x0F},
	{0x4750, 0x14},
	{0x47B4, 0x14},
	
	{0x0100,0x01},

};


static struct regval_list sensor_sxga_regs[] = { //SXGA: 1280*960@30fps
	//720Mbps 4lane 20fps
	{0x30EB , 0x05 },
	{0x30EB , 0x0C },
	{0x300A , 0xFF },
	{0x300B , 0xFF },
	{0x30EB , 0x05 },
	{0x30EB , 0x09 },
	{0x0114 , 0x03 },
	{0x0128 , 0x00 },
	{0x012A , 0x18 },
	{0x012B , 0x00 },
	{0x0160 , 0x0a },
	{0x0161 , 0x2f },
	{0x0162 , 0x0d },
	{0x0163 , 0xe8 },
	{0x0164 , 0x03 },
	{0x0165 , 0xe8 },
	{0x0166 , 0x08 },
	{0x0167 , 0xe7 },
	{0x0168 , 0x02 },
	{0x0169 , 0xf0 },
	{0x016A , 0x06 },
	{0x016B , 0xaF },
	{0x016C , 0x05 },
	{0x016D , 0x00 },
	{0x016E , 0x03 },
	{0x016F , 0xc0 },

	//{0x016C , 0x0c },
	//{0x016D , 0xd0 },
	//{0x016E , 0x09 },
	//{0x016F , 0xa0 },
	{0x0170 , 0x01 },
	{0x0171 , 0x01 },
	{0x0174 , 0x00 },
	{0x0175 , 0x00 },
	{0x018C , 0x0A },
	{0x018D , 0x0A },
	{0x0301 , 0x05 },
	{0x0303 , 0x01 },
	{0x0304 , 0x03 },
	{0x0305 , 0x03 },
	{0x0306 , 0x00 },
	{0x0307 , 0x57 },
	{0x0309 , 0x0A },
	{0x030B , 0x01 },
	{0x030C , 0x00 },
	{0x030D , 0x5A },
	{0x4767 , 0x0F },
	{0x4750 , 0x14 },
	{0x47B4 , 0x14 },
	{0x0100,0x01},
};

//for video
static struct regval_list sensor_1080p_regs[] = { //1080: 1920*1080@30fps
	// MIPI=720Mbps
	// 1920x1080 30fps
	{0x30EB , 0x05 },
	{0x30EB , 0x0C },
	{0x300A , 0xFF },
	{0x300B , 0xFF },
	{0x30EB , 0x05 },
	{0x30EB , 0x09 },
	//{0x     , 0x   },
	{0x0114 , 0x03 },
	{0x0128 , 0x00 },
	{0x012A , 0x18 },
	{0x012B , 0x00 },
	//{0x0157 , 0x   },
	//{0x015A , 0x   },
	//{0x015B , 0x   },
	{0x0160 , 0x0A },
	{0x0161 , 0x2F },
	{0x0162 , 0x0D },
	{0x0163 , 0xE8 },
	{0x0164 , 0x02 },
	{0x0165 , 0xA8 },
	{0x0166 , 0x0A },
	{0x0167 , 0x27 },
	{0x0168 , 0x02 },
	{0x0169 , 0xB4 },
	{0x016A , 0x06 },
	{0x016B , 0xEB },
	{0x016C , 0x07 },
	{0x016D , 0x80 },
	{0x016E , 0x04 },
	{0x016F , 0x38 },
	{0x0170 , 0x01 },
	{0x0171 , 0x01 },
	{0x0174 , 0x00 },
	{0x0175 , 0x00 },
	{0x018C , 0x0A },
	{0x018D , 0x0A },
	{0x0301 , 0x05 },
	{0x0303 , 0x01 },
	{0x0304 , 0x03 },
	{0x0305 , 0x03 },
	{0x0306 , 0x00 },
	{0x0307 , 0x57 },
	{0x0309 , 0x0A },
	{0x030B , 0x01 },
	{0x030C , 0x00 },
	{0x030D , 0x5A },
	{0x4767 , 0x0F },
	{0x4750 , 0x14 },
	{0x47B4 , 0x14 },
	{0x0100,0x01},
};



static struct regval_list sensor_720p_regs[] = { //720: 1280*720@30fps
	// MIPI=720Mbps,
	// 1280x720 60fps //perhaps reach to 100~120fps
	{0x30EB , 0x05 },
	{0x30EB , 0x0C },
	{0x300A , 0xFF },
	{0x300B , 0xFF },
	{0x30EB , 0x05 },
	{0x30EB , 0x09 },
	{0x0114 , 0x03 },
	{0x0128 , 0x00 },
	{0x012A , 0x18 },
	{0x012B , 0x00 },
	{0x0160 , 0x02 },//0x05 for 60fps
	{0x0161 , 0x00 },//0x17 for 60fps
	{0x0162 , 0x0d/*0D*/ },
	{0x0163 , 0xE8 },
	{0x0164 , 0x03 },
	{0x0165 , 0xE8 },
	{0x0166 , 0x08 },
	{0x0167 , 0xE7 },
	{0x0168 , 0x03 },
	{0x0169 , 0x68 },
	{0x016A , 0x06 },
	{0x016B , 0x37 },
	{0x016C , 0x05 },
	{0x016D , 0x00 },
	{0x016E , 0x02 },
	{0x016F , 0xD0 },
	{0x0170 , 0x01 },
	{0x0171 , 0x01 },
	{0x0174 , 0x00 },
	{0x0175 , 0x00 },
	{0x018C , 0x0A },
	{0x018D , 0x0A },
	{0x0301 , 0x05 },
	{0x0303 , 0x01 },
	{0x0304 , 0x03 },
	{0x0305 , 0x03 },
	{0x0306 , 0x00},
	{0x0307 , 0x57 },
	{0x0309 , 0x05/*0A*/ },
	{0x030B , 0x01 },
	{0x030C , 0x00 },
	{0x030D , 0x5A },
	{0x4767 , 0x0F },
	{0x4750 , 0x14 },
	{0x47B4 , 0x14 },
	{0x0100,0x01},
};

static struct regval_list sensor_vga_regs[] = { //VGA:  640*480

};

//misc
static struct regval_list sensor_oe_disable_regs[] = {
};

static struct regval_list sensor_oe_enable_regs[] = {
};


/*
 * Here we'll try to encapsulate the changes for just the output
 * video format.
 * 
 */

static struct regval_list sensor_fmt_raw[] = {

};

  
static int sensor_s_exp_gain(struct v4l2_subdev *sd, struct sensor_exp_gain *exp_gain)
{ //return -1;
	int exp_val, gain_val,frame_length,shutter;
	unsigned char explow=0,expmid=0,exphigh=0;
	unsigned char gainlow=0,gainhigh=0;  
	struct sensor_info *info = to_state(sd);

	exp_val = exp_gain->exp_val;
	gain_val = exp_gain->gain_val;

	//if((info->exp == exp_val)&&(info->gain == gain_val))
	//	return 0;
	if(gain_val<1*16)
		gain_val=16;
	if(gain_val>10*16-1)
		gain_val=10*16-1;

	if(exp_val>0xfffff)
		exp_val=0xfffff;

	exp_val >>=4;
	exphigh  = (unsigned char) ( (0x00ff00&exp_val)>>8);
	explow	= (unsigned char) ( (0x0000ff&exp_val)	 );


	sensor_write(sd, 0x015b, explow);
	sensor_write(sd, 0x015a, exphigh);

	shutter = exp_val;

	if(shutter  > imx219_sensor_vts- 4)
		frame_length = shutter + 4;
	else
		frame_length = imx219_sensor_vts;
	sensor_write(sd,0x0161,frame_length & 0xff);  

	sensor_write(sd,0x0160,frame_length >>8);  
	if (gain_val ==16)
		sensor_write(sd,0x0157,0x01);
	if(ES_GAIN(1.0,1.1,gain_val))
		sensor_write(sd,0x0157,24);
	else if(ES_GAIN(1.1,1.2,gain_val))
		sensor_write(sd,0x0157,42);
	else if(ES_GAIN(1.2,1.3,gain_val))
		sensor_write(sd,0x0157,60);
	else if(ES_GAIN(1.3,1.4,gain_val))
		sensor_write(sd,0x0157,73);
	else if(ES_GAIN(1.4,1.5,gain_val))
		sensor_write(sd,0x0157,85);
	else if(ES_GAIN(1.5,1.6,gain_val))
		sensor_write(sd,0x0157,96);
	else if(ES_GAIN(1.6,1.7,gain_val))
		sensor_write(sd,0x0157,105);
	else if(ES_GAIN(1.7,1.8,gain_val))
		sensor_write(sd,0x0157,114);
	else if(ES_GAIN(1.8,1.9,gain_val))
		sensor_write(sd,0x0157,122);
	else if(ES_GAIN(1.9,2.0,gain_val))
		sensor_write(sd,0x0157,0x80);
	else if(ES_GAIN(2.0,2.1,gain_val))
		sensor_write(sd,0x0157,134);
	else if(ES_GAIN(2.1,2.2,gain_val))
		sensor_write(sd,0x0157,140);
	else if(ES_GAIN(2.2,2.3,gain_val))
		sensor_write(sd,0x0157,145);
	else if(ES_GAIN(2.3,2.4,gain_val))
		sensor_write(sd,0x0157,150);
	else if(ES_GAIN(2.4,2.5,gain_val))
		sensor_write(sd,0x0157,154);
	else if(ES_GAIN(2.5,2.6,gain_val))
		sensor_write(sd,0x0157,158);
	else if(ES_GAIN(2.6,2.7,gain_val))
		sensor_write(sd,0x0157,162);
	else if(ES_GAIN(2.7,2.8,gain_val))
		sensor_write(sd,0x0157,165);

	else if(ES_GAIN(2.8,2.9,gain_val))
		sensor_write(sd,0x0157,168);
	else if(ES_GAIN(2.9,3.0,gain_val))
		sensor_write(sd,0x0157,0xab);
	else if(ES_GAIN(3.0,3.1,gain_val))
		sensor_write(sd,0x0157,174);
	else if(ES_GAIN(3.1,3.2,gain_val))
		sensor_write(sd,0x0157,176);
	else if(ES_GAIN(3.2,3.3,gain_val))
		sensor_write(sd,0x0157,179);
	else if(ES_GAIN(3.3,3.4,gain_val))
		sensor_write(sd,0x0157,181);
	else if(ES_GAIN(3.4,3.5,gain_val))
		sensor_write(sd,0x0157,183);
	else if(ES_GAIN(3.5,3.6,gain_val))
		sensor_write(sd,0x0157,185);
	else if(ES_GAIN(3.6,3.7,gain_val))
		sensor_write(sd,0x0157,187);
	else if(ES_GAIN(3.7,3.8,gain_val))
		sensor_write(sd,0x0157,189);
	else if(ES_GAIN(3.8,3.9,gain_val))
		sensor_write(sd,0x0157,191);
	else if(ES_GAIN(3.9,4.0,gain_val))
		sensor_write(sd,0x0157,192);
	else if(ES_GAIN(4.0,4.1,gain_val))
		sensor_write(sd,0x0157,194);
	else if(ES_GAIN(4.1,4.2,gain_val))
		sensor_write(sd,0x0157,195);
	else if(ES_GAIN(4.2,4.3,gain_val))
		sensor_write(sd,0x0157,197);
	else if(ES_GAIN(4.3,4.4,gain_val))
		sensor_write(sd,0x0157,198);
	else if(ES_GAIN(4.4,4.5,gain_val))
		sensor_write(sd,0x0157,200);
	else if(ES_GAIN(4.5,4.6,gain_val))
		sensor_write(sd,0x0157,201);
	else if(ES_GAIN(4.6,4.7,gain_val))
		sensor_write(sd,0x0157,202);
	else if(ES_GAIN(4.7,4.8,gain_val))
		sensor_write(sd,0x0157,203);
	else if(ES_GAIN(4.8,4.9,gain_val))
		sensor_write(sd,0x0157,204);
	else if(ES_GAIN(4.9,5.0,gain_val))
		sensor_write(sd,0x0157,205);
	else if(ES_GAIN(5.0,5.1,gain_val))
		sensor_write(sd,0x0157,206);
	else if(ES_GAIN(5.1,5.2,gain_val))
		sensor_write(sd,0x0157,207);


	else if(ES_GAIN(5.2,5.3,gain_val))
		sensor_write(sd,0x0157,208);
	else if(ES_GAIN(5.3,5.4,gain_val))
		sensor_write(sd,0x0157,209);
	else if(ES_GAIN(5.4,5.5,gain_val))
		sensor_write(sd,0x0157,210);
	else if(ES_GAIN(5.5,5.7,gain_val))
		sensor_write(sd,0x0157,211);
	else if(ES_GAIN(5.7,5.8,gain_val))
		sensor_write(sd,0x0157,212);
	else if(ES_GAIN(5.8,5.9,gain_val))
		sensor_write(sd,0x0157,213);
	else if(ES_GAIN(5.9,6.2,gain_val))
		sensor_write(sd,0x0157,215);
	else if(ES_GAIN(6.2,6.4,gain_val))
		sensor_write(sd,0x0157,216);
	else if(ES_GAIN(6.4,6.5,gain_val))
		sensor_write(sd,0x0157,217);
	else if(ES_GAIN(6.5,6.7,gain_val))
		sensor_write(sd,0x0157,218);
	else if(ES_GAIN(6.7,6.9,gain_val))
		sensor_write(sd,0x0157,219);
	else if(ES_GAIN(6.9,7.1,gain_val))
		sensor_write(sd,0x0157,220);
	else if(ES_GAIN(7.1,7.3,gain_val))
		sensor_write(sd,0x0157,221);
	else if(ES_GAIN(7.3,7.5,gain_val))
		sensor_write(sd,0x0157,222);
	else if(ES_GAIN(7.5,7.7,gain_val))
		sensor_write(sd,0x0157,223);
	else if(ES_GAIN(7.7,8.0,gain_val))
		sensor_write(sd,0x0157,224);
	else if(ES_GAIN(8.0,8.3,gain_val))
		sensor_write(sd,0x0157,225);
	else if(ES_GAIN(8.3,8.5,gain_val))
		sensor_write(sd,0x0157,226);
	else if(ES_GAIN(8.5,8.8,gain_val))
		sensor_write(sd,0x0157,227);
	else if(ES_GAIN(8.8,9.1,gain_val))
		sensor_write(sd,0x0157,228);


	else if(ES_GAIN(9.1,9.4,gain_val))
		sensor_write(sd,0x0157,228);
	else if(ES_GAIN(9.4,9.8,gain_val))
		sensor_write(sd,0x0157,230);
	else if(ES_GAIN(9.8,10.2,gain_val))
		sensor_write(sd,0x0157,231);
	else if(ES_GAIN(10.0,10.6,gain_val))
		sensor_write(sd,0x0157,232);

	info->exp = exp_val;
	info->gain = gain_val;
	return 0;
}

static int sensor_g_exp(struct v4l2_subdev *sd, __s32 *value)
{
	struct sensor_info *info = to_state(sd);
  
	*value = info->exp;
	vfe_dev_dbg("sensor_get_exposure = %d\n", info->exp);
	return 0;
}

static int sensor_s_exp(struct v4l2_subdev *sd, unsigned int exp_val)
{
	unsigned char explow,exphigh;
	struct sensor_info *info = to_state(sd);

	if(exp_val>0xfffff)
		exp_val=0xfffff;
	exp_val >>=4;
	exphigh  = (unsigned char) ( (0x00ff00&exp_val)>>8);
	explow  = (unsigned char) ( (0x0000ff&exp_val)   );
	sensor_write(sd, 0x015b, explow);
	sensor_write(sd, 0x015a, exphigh);

	info->exp = exp_val;
	return 0;
}

static int sensor_g_gain(struct v4l2_subdev *sd, __s32 *value)
{
	struct sensor_info *info = to_state(sd);
  
	*value = info->gain;
	vfe_dev_dbg("sensor_get_gain = %d\n", info->gain);
	return 0;
}

static int sensor_s_gain(struct v4l2_subdev *sd, int gain_val)
{
	struct sensor_info *info = to_state(sd);
	if(gain_val<1*16)
		gain_val=16;
	if(gain_val > 0x1ff)
		gain_val = 0x1ff;
	if (gain_val ==16)
		sensor_write(sd,0x0157,0x01);
	if(ES_GAIN(1.0,1.1,gain_val))
		sensor_write(sd,0x0157,24);
	else if(ES_GAIN(1.1,1.2,gain_val))
		sensor_write(sd,0x0157,42);
	else if(ES_GAIN(1.2,1.3,gain_val))
		sensor_write(sd,0x0157,60);
	else if(ES_GAIN(1.3,1.4,gain_val))
		sensor_write(sd,0x0157,73);
	else if(ES_GAIN(1.4,1.5,gain_val))
		sensor_write(sd,0x0157,85);
	else if(ES_GAIN(1.5,1.6,gain_val))
		sensor_write(sd,0x0157,96);
	else if(ES_GAIN(1.6,1.7,gain_val))
		sensor_write(sd,0x0157,105);
	else if(ES_GAIN(1.7,1.8,gain_val))
		sensor_write(sd,0x0157,114);
	else if(ES_GAIN(1.8,1.9,gain_val))
		sensor_write(sd,0x0157,122);
	else if(ES_GAIN(1.9,2.0,gain_val))
		sensor_write(sd,0x0157,0x80);
	else if(ES_GAIN(2.0,2.1,gain_val))
		sensor_write(sd,0x0157,134);
	else if(ES_GAIN(2.1,2.2,gain_val))
		sensor_write(sd,0x0157,140);
	else if(ES_GAIN(2.2,2.3,gain_val))
		sensor_write(sd,0x0157,145);
	else if(ES_GAIN(2.3,2.4,gain_val))
		sensor_write(sd,0x0157,150);
	else if(ES_GAIN(2.4,2.5,gain_val))
		sensor_write(sd,0x0157,154);
	else if(ES_GAIN(2.5,2.6,gain_val))
		sensor_write(sd,0x0157,158);
	else if(ES_GAIN(2.6,2.7,gain_val))
		sensor_write(sd,0x0157,162);
	else if(ES_GAIN(2.7,2.8,gain_val))
		sensor_write(sd,0x0157,165);

	else if(ES_GAIN(2.8,2.9,gain_val))
		sensor_write(sd,0x0157,168);
	else if(ES_GAIN(2.9,3.0,gain_val))
		sensor_write(sd,0x0157,0xab);
	else if(ES_GAIN(3.0,3.1,gain_val))
		sensor_write(sd,0x0157,174);
	else if(ES_GAIN(3.1,3.2,gain_val))
		sensor_write(sd,0x0157,176);
	else if(ES_GAIN(3.2,3.3,gain_val))
		sensor_write(sd,0x0157,179);
	else if(ES_GAIN(3.3,3.4,gain_val))
		sensor_write(sd,0x0157,181);
	else if(ES_GAIN(3.4,3.5,gain_val))
		sensor_write(sd,0x0157,183);
	else if(ES_GAIN(3.5,3.6,gain_val))
		sensor_write(sd,0x0157,185);
	else if(ES_GAIN(3.6,3.7,gain_val))
		sensor_write(sd,0x0157,187);
	else if(ES_GAIN(3.7,3.8,gain_val))
		sensor_write(sd,0x0157,189);
	else if(ES_GAIN(3.8,3.9,gain_val))
		sensor_write(sd,0x0157,191);
	else if(ES_GAIN(3.9,4.0,gain_val))
		sensor_write(sd,0x0157,192);
	else if(ES_GAIN(4.0,4.1,gain_val))
		sensor_write(sd,0x0157,194);
	else if(ES_GAIN(4.1,4.2,gain_val))
		sensor_write(sd,0x0157,195);
	else if(ES_GAIN(4.2,4.3,gain_val))
		sensor_write(sd,0x0157,197);
	else if(ES_GAIN(4.3,4.4,gain_val))
		sensor_write(sd,0x0157,198);
	else if(ES_GAIN(4.4,4.5,gain_val))
		sensor_write(sd,0x0157,200);
	else if(ES_GAIN(4.5,4.6,gain_val))
		sensor_write(sd,0x0157,201);
	else if(ES_GAIN(4.6,4.7,gain_val))
		sensor_write(sd,0x0157,202);
	else if(ES_GAIN(4.7,4.8,gain_val))
		sensor_write(sd,0x0157,203);
	else if(ES_GAIN(4.8,4.9,gain_val))
		sensor_write(sd,0x0157,204);
	else if(ES_GAIN(4.9,5.0,gain_val))
		sensor_write(sd,0x0157,205);
	else if(ES_GAIN(5.0,5.1,gain_val))
		sensor_write(sd,0x0157,206);
	else if(ES_GAIN(5.1,5.2,gain_val))
		sensor_write(sd,0x0157,207);


	else if(ES_GAIN(5.2,5.3,gain_val))
		sensor_write(sd,0x0157,208);
	else if(ES_GAIN(5.3,5.4,gain_val))
		sensor_write(sd,0x0157,209);
	else if(ES_GAIN(5.4,5.5,gain_val))
		sensor_write(sd,0x0157,210);
	else if(ES_GAIN(5.5,5.7,gain_val))
		sensor_write(sd,0x0157,211);
	else if(ES_GAIN(5.7,5.8,gain_val))
		sensor_write(sd,0x0157,212);
	else if(ES_GAIN(5.8,5.9,gain_val))
		sensor_write(sd,0x0157,213);
	else if(ES_GAIN(5.9,6.2,gain_val))
		sensor_write(sd,0x0157,215);
	else if(ES_GAIN(6.2,6.4,gain_val))
		sensor_write(sd,0x0157,216);
	else if(ES_GAIN(6.4,6.5,gain_val))
		sensor_write(sd,0x0157,217);
	else if(ES_GAIN(6.5,6.7,gain_val))
		sensor_write(sd,0x0157,218);
	else if(ES_GAIN(6.7,6.9,gain_val))
		sensor_write(sd,0x0157,219);
	else if(ES_GAIN(6.9,7.1,gain_val))
		sensor_write(sd,0x0157,220);
	else if(ES_GAIN(7.1,7.3,gain_val))
		sensor_write(sd,0x0157,221);
	else if(ES_GAIN(7.3,7.5,gain_val))
		sensor_write(sd,0x0157,222);
	else if(ES_GAIN(7.5,7.7,gain_val))
		sensor_write(sd,0x0157,223);
	else if(ES_GAIN(7.7,8.0,gain_val))
		sensor_write(sd,0x0157,224);
	else if(ES_GAIN(8.0,8.3,gain_val))
		sensor_write(sd,0x0157,225);
	else if(ES_GAIN(8.3,8.5,gain_val))
		sensor_write(sd,0x0157,226);
	else if(ES_GAIN(8.5,8.8,gain_val))
		sensor_write(sd,0x0157,227);
	else if(ES_GAIN(8.8,9.1,gain_val))
		sensor_write(sd,0x0157,228);


	else if(ES_GAIN(9.1,9.4,gain_val))
		sensor_write(sd,0x0157,228);
	else if(ES_GAIN(9.4,9.8,gain_val))
		sensor_write(sd,0x0157,230);
	else if(ES_GAIN(9.8,10.2,gain_val))
		sensor_write(sd,0x0157,231);
	else if(ES_GAIN(10.0,10.6,gain_val))
		sensor_write(sd,0x0157,232);
	info->gain = gain_val;

	return 0;
}

static int sensor_s_sw_stby(struct v4l2_subdev *sd, int on_off)
{
	int ret;
	data_type rdval;

	ret=sensor_read(sd, 0x0100, &rdval);
	if(ret!=0)
		return ret;

	if(on_off==CSI_GPIO_LOW)//sw stby on
	{
		ret=sensor_write(sd, 0x0100, rdval&0xfe);
	}
	else//sw stby off
	{
		ret=sensor_write(sd, 0x0100, rdval|0x01);
	}
	return ret;
}



/*
 * Stuff that knows about the sensor.
 */
 
static int sensor_power(struct v4l2_subdev *sd, int on)
{
	int ret;

	ret = 0;
	switch(on)
	{
		case CSI_SUBDEV_STBY_ON:
			vfe_dev_dbg("CSI_SUBDEV_STBY_ON!\n");
			cci_lock(sd);
			vfe_gpio_write(sd,RESET,CSI_GPIO_LOW);
			cci_unlock(sd);  
			vfe_set_mclk(sd,OFF);
			break;
		case CSI_SUBDEV_STBY_OFF:
			vfe_dev_dbg("CSI_SUBDEV_STBY_OFF!\n");
			cci_lock(sd);    
			vfe_set_mclk_freq(sd,MCLK);
			vfe_set_mclk(sd,ON);
			msleep(20);
			cci_unlock(sd);        
			vfe_gpio_write(sd,RESET,CSI_GPIO_HIGH);
			break;
		case CSI_SUBDEV_PWR_ON:
			vfe_dev_dbg("CSI_SUBDEV_PWR_ON!\n");
			cci_lock(sd);    
			vfe_gpio_set_status(sd,PWDN,1);//set the gpio to output
			vfe_gpio_set_status(sd,RESET,1);//set the gpio to output
			vfe_gpio_write(sd,PWDN,CSI_GPIO_LOW);
			vfe_gpio_write(sd,RESET,CSI_GPIO_LOW);
			usleep_range(1000,1200);
			vfe_set_mclk_freq(sd,MCLK);
			vfe_set_mclk(sd,ON);
			usleep_range(10000,12000);
			vfe_gpio_write(sd,POWER_EN,CSI_GPIO_HIGH);
			vfe_set_pmu_channel(sd,IOVDD,ON);
			vfe_set_pmu_channel(sd,AVDD,ON);
			vfe_set_pmu_channel(sd,DVDD,ON);
			vfe_set_pmu_channel(sd,AFVDD,ON);
			usleep_range(10000,12000);
			vfe_gpio_write(sd,PWDN,CSI_GPIO_HIGH);
			vfe_gpio_write(sd,RESET,CSI_GPIO_HIGH);
			usleep_range(30000,31000);
			cci_unlock(sd);  
			break;
		case CSI_SUBDEV_PWR_OFF:
			vfe_dev_dbg("CSI_SUBDEV_PWR_OFF!\n");
			cci_lock(sd);    
			vfe_set_mclk(sd,OFF);
			vfe_gpio_write(sd,POWER_EN,CSI_GPIO_LOW);
			vfe_set_pmu_channel(sd,AFVDD,OFF);
			vfe_set_pmu_channel(sd,DVDD,OFF);
			vfe_set_pmu_channel(sd,AVDD,OFF);
			vfe_set_pmu_channel(sd,IOVDD,OFF);  
			usleep_range(10000,12000);
			vfe_gpio_write(sd,PWDN,CSI_GPIO_LOW);
			vfe_gpio_write(sd,RESET,CSI_GPIO_LOW);

			vfe_gpio_set_status(sd,RESET,0);//set the gpio to input
			vfe_gpio_set_status(sd,PWDN,0);//set the gpio to input
			cci_unlock(sd);  
			break;
		default:
			return -EINVAL;
	}   
	return 0;
}
 
static int sensor_reset(struct v4l2_subdev *sd, u32 val)
{
	switch(val)
	{
		case 0:
			vfe_gpio_write(sd,RESET,CSI_GPIO_HIGH);
			usleep_range(10000,12000);
			break;
		case 1:
			vfe_gpio_write(sd,RESET,CSI_GPIO_LOW);
			usleep_range(10000,12000);
			break;
		default:
			return -EINVAL;
	}

	return 0;
}

static int sensor_detect(struct v4l2_subdev *sd)
{
	data_type rdval;
  
	LOG_ERR_RET(sensor_read(sd, 0x0000, &rdval))
	if((rdval&0x0f) != 0x02)
		return -ENODEV;
 
	LOG_ERR_RET(sensor_read(sd, 0x0001, &rdval))
	if(rdval != 0x19)
		return -ENODEV;
	printk("find the sony IMX219 ***********\n");
  	return 0;
}

static int sensor_init(struct v4l2_subdev *sd, u32 val)
{
	int ret;
	struct sensor_info *info = to_state(sd);
  
	vfe_dev_dbg("sensor_init\n");
  
	/*Make sure it is a target sensor*/
	ret = sensor_detect(sd);
	if (ret) {
		vfe_dev_err("chip found is not an target chip.\n");
		return ret;
	}
  
	vfe_get_standby_mode(sd,&info->stby_mode);

	if((info->stby_mode == HW_STBY || info->stby_mode == SW_STBY) \
			&& info->init_first_flag == 0) {
		vfe_dev_print("stby_mode and init_first_flag = 0\n");
		return 0;
	}
  
	info->focus_status = 0;
	info->low_speed = 0;
	info->width = HXGA_WIDTH;
	info->height = HXGA_HEIGHT;
	info->hflip = 0;
	info->vflip = 0;
	info->gain = 0;

	info->tpf.numerator = 1;            
	info->tpf.denominator = 30;    /* 30fps */    

	ret = sensor_write_array(sd, sensor_default_regs, ARRAY_SIZE(sensor_default_regs));  
	if(ret < 0) {
		vfe_dev_err("write sensor_default_regs error\n");
		return ret;
	}
  
	if(info->stby_mode == 0)
		info->init_first_flag = 0;
  
	info->preview_first_flag = 1;
  
	return 0;
}

static long sensor_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
{
	int ret=0;
	struct sensor_info *info = to_state(sd);
	switch(cmd) {
		case GET_CURRENT_WIN_CFG:
			if(info->current_wins != NULL)
			{
				memcpy( arg,
				        info->current_wins,
				        sizeof(struct sensor_win_size) );
				ret=0;
			}
			else
			{
				vfe_dev_err("empty wins!\n");
				ret=-1;
			}
			break;
		case SET_FPS:
			break;
		case ISP_SET_EXP_GAIN:
			sensor_s_exp_gain(sd, (struct sensor_exp_gain *)arg);
			break;
		default:
			return -EINVAL;
	}
	return ret;
}


/*
 * Store information about the video data format. 
 */
static struct sensor_format_struct {
	__u8 *desc;
	//__u32 pixelformat;
	enum v4l2_mbus_pixelcode mbus_code;
	struct regval_list *regs;
	int regs_size;
	int bpp;   /* Bytes per pixel */
}sensor_formats[] = {
	{
		.desc   = "Raw RGB Bayer",
		.mbus_code	= V4L2_MBUS_FMT_SRGGB10_10X1,
		.regs     = sensor_fmt_raw,
		.regs_size = ARRAY_SIZE(sensor_fmt_raw),
		.bpp    = 1
	},
};
#define N_FMTS ARRAY_SIZE(sensor_formats)

  

/*
 * Then there is the issue of window sizes.  Try to capture the info here.
 */


static struct sensor_win_size sensor_win_sizes[] = {
	/* 3280*2464 */
	{
		.width      = 3264,//3280,
		.height     = 2448,//2464,
		.hoffset    = (3280-3264)/2,//0,
		.voffset    = (2464-2448)/2,//0,
		.hts        = 3448,//4352,//3448,//4037,
		.vts        = 4037,//2757,//4037,
		.pclk       = (278*1000*1000),//252*1000*1000,
		.mipi_bps   = 720*1000*1000,
		.fps_fixed  = 1,
		.bin_factor = 1,
		.intg_min   = 1<<4,
		.intg_max   = (4037-4)<<4,
		.gain_min   = 1<<4,
		.gain_max   = 10<<4,
		.regs       = sensor_hxga_regs,
		.regs_size  = ARRAY_SIZE(sensor_hxga_regs),
		.set_size   = NULL,
	},

	/* 1080P */
	{
		.width      = HD1080_WIDTH,
		.height     = HD1080_HEIGHT,
		.hoffset    = 0,
		.voffset    = 0,
		.hts        = 3560,
		.vts        = 2607,
		.pclk       = (278*1000*1000),
		.mipi_bps   = 720*1000*1000,
		.fps_fixed  = 1,
		.bin_factor = 2,
		.intg_min   = 1<<4,
		.intg_max   = (2607-4)<<4,
		.gain_min   = 1<<4,
		.gain_max   = 10<<4,
		.regs       = sensor_1080p_regs,//
		.regs_size  = ARRAY_SIZE(sensor_1080p_regs),//
		.set_size   = NULL,
	},
	/* SXGA */
	{
		.width      = SXGA_WIDTH,
		.height     = SXGA_HEIGHT,
		.hoffset    = 0,
		.voffset    = 0,
		.hts        = 3560,
		.vts        = 2607,
		.pclk       = (278*1000*1000),
		.mipi_bps   = 720*1000*1000,
		.fps_fixed  = 1,
		.bin_factor = 2,
		.intg_min   = 1<<4,
		.intg_max   = 2607<<4,
		.gain_min   = 1<<4,
		.gain_max   = 10<<4,
		.regs       = sensor_sxga_regs,
		.regs_size  = ARRAY_SIZE(sensor_sxga_regs),
		.set_size   = NULL,
	},
	/* 720p */
	{
		.width      = HD720_WIDTH,
		.height     = HD720_HEIGHT,
		.hoffset    = 0,
		.voffset    = 0,
		.hts        = 2560,
		.vts        = 1303,//735 106fps
		.pclk       = (200*1000*1000),
		.mipi_bps   = 720*1000*1000,
		.fps_fixed  = 1,
		.bin_factor = 2,
		.intg_min   = 1<<4,
		.intg_max   = (1303-4)<<4,
		.gain_min   = 1<<4,
		.gain_max   = 10<<4,
		.regs       = sensor_720p_regs,//
		.regs_size  = ARRAY_SIZE(sensor_720p_regs),//
		.set_size   = NULL,
	},

};

#define N_WIN_SIZES (ARRAY_SIZE(sensor_win_sizes))

static int sensor_enum_fmt(struct v4l2_subdev *sd, unsigned index,
                 enum v4l2_mbus_pixelcode *code)
{
	if (index >= N_FMTS)
		return -EINVAL;

	*code = sensor_formats[index].mbus_code;
	return 0;
}

static int sensor_enum_size(struct v4l2_subdev *sd,
                            struct v4l2_frmsizeenum *fsize)
{
	if(fsize->index > N_WIN_SIZES-1)
		return -EINVAL;
  
	fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
	fsize->discrete.width = sensor_win_sizes[fsize->index].width;
	fsize->discrete.height = sensor_win_sizes[fsize->index].height;
  
	return 0;
}


static int sensor_try_fmt_internal(struct v4l2_subdev *sd,
    struct v4l2_mbus_framefmt *fmt,
    struct sensor_format_struct **ret_fmt,
    struct sensor_win_size **ret_wsize)
{
	int index;
	struct sensor_win_size *wsize;
	struct sensor_info *info = to_state(sd);

	for (index = 0; index < N_FMTS; index++)
		if (sensor_formats[index].mbus_code == fmt->code)
			break;

	if (index >= N_FMTS)
		return -EINVAL;

	if (ret_fmt != NULL)
		*ret_fmt = sensor_formats + index;

	/*
	* Fields: the sensor devices claim to be progressive.
	*/
	fmt->field = V4L2_FIELD_NONE;

	/*
	* Round requested image size down to the nearest
	* we support, but not below the smallest.
	*/
	for (wsize = sensor_win_sizes; wsize < sensor_win_sizes + N_WIN_SIZES; wsize++)
		if (fmt->width >= wsize->width && fmt->height >= wsize->height)
			break;

	if (wsize >= sensor_win_sizes + N_WIN_SIZES)
		wsize--;   /* Take the smallest one */
	if (ret_wsize != NULL)
		*ret_wsize = wsize;
	/*
	* Note the size we'll actually handle.
	*/
	fmt->width = wsize->width;
	fmt->height = wsize->height;
	info->current_wins = wsize;
	return 0;
}

static int sensor_try_fmt(struct v4l2_subdev *sd, 
             struct v4l2_mbus_framefmt *fmt)
{
	return sensor_try_fmt_internal(sd, fmt, NULL, NULL);
}

static int sensor_g_mbus_config(struct v4l2_subdev *sd,
           struct v4l2_mbus_config *cfg)
{
	cfg->type = V4L2_MBUS_CSI2;
	cfg->flags = 0|V4L2_MBUS_CSI2_4_LANE|V4L2_MBUS_CSI2_CHANNEL_0;
  
	return 0;
}


/*
 * Set a format.
 */
static int sensor_s_fmt(struct v4l2_subdev *sd, 
             struct v4l2_mbus_framefmt *fmt)
{
	int ret;
	struct sensor_format_struct *sensor_fmt;
	struct sensor_win_size *wsize;
	struct sensor_info *info = to_state(sd);
  
	vfe_dev_dbg("sensor_s_fmt\n");
  
	ret = sensor_try_fmt_internal(sd, fmt, &sensor_fmt, &wsize);
	if (ret)
		return ret;
  
	if(info->capture_mode == V4L2_MODE_VIDEO)
	{
	//video
	}
	else if(info->capture_mode == V4L2_MODE_IMAGE)
	{
	//image
	}

	sensor_write_array(sd, sensor_fmt->regs, sensor_fmt->regs_size);

	ret = 0;
	if (wsize->regs)
		LOG_ERR_RET(sensor_write_array(sd, wsize->regs, wsize->regs_size))

	if (wsize->set_size)
		LOG_ERR_RET(wsize->set_size(sd))
   
	info->fmt = sensor_fmt;
	info->width = wsize->width;
	info->height = wsize->height;
	imx219_sensor_vts = wsize->vts;

	vfe_dev_print("s_fmt set width = %d, height = %d\n",wsize->width,wsize->height);
  
	if(info->capture_mode == V4L2_MODE_VIDEO)
	{
	//video
	} else {
	//capture image
	}
  
	return 0;
}

/*
 * Implement G/S_PARM.  There is a "high quality" mode we could try
 * to do someday; for now, we just do the frame rate tweak.
 */
static int sensor_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
{
	struct v4l2_captureparm *cp = &parms->parm.capture;
	struct sensor_info *info = to_state(sd);

	if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;
  
	memset(cp, 0, sizeof(struct v4l2_captureparm));
	cp->capability = V4L2_CAP_TIMEPERFRAME;
	cp->capturemode = info->capture_mode;
     
	return 0;
}

static int sensor_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
{
	struct v4l2_captureparm *cp = &parms->parm.capture;
	struct sensor_info *info = to_state(sd);
  
	vfe_dev_dbg("sensor_s_parm\n");
  
	if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;
  
	if (info->tpf.numerator == 0)
		return -EINVAL;
    
	info->capture_mode = cp->capturemode;
  
	return 0;
}


static int sensor_queryctrl(struct v4l2_subdev *sd,
    struct v4l2_queryctrl *qc)
{
	/* Fill in min, max, step and default value for these controls. */
	/* see include/linux/videodev2.h for details */

	switch (qc->id) {
	case V4L2_CID_GAIN:
		return v4l2_ctrl_query_fill(qc, 1*16, 11*16, 1, 1*16);
	case V4L2_CID_EXPOSURE:
		return v4l2_ctrl_query_fill(qc, 0, 65535*16, 1, 16);
	case V4L2_CID_FRAME_RATE:
		return v4l2_ctrl_query_fill(qc, 15, 120, 1, 120);
	}
	return -EINVAL;
}

static int sensor_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	switch (ctrl->id) {
	case V4L2_CID_GAIN:
		return sensor_g_gain(sd, &ctrl->value);
	case V4L2_CID_EXPOSURE:
		return sensor_g_exp(sd, &ctrl->value);
	}
	return -EINVAL;
}

static int sensor_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	struct v4l2_queryctrl qc;
	int ret;

	qc.id = ctrl->id;
	ret = sensor_queryctrl(sd, &qc);
	if (ret < 0) {
		return ret;
	}

	if (ctrl->value < qc.minimum || ctrl->value > qc.maximum) {
		vfe_dev_err("max gain qurery is %d,min gain qurey is %d\n",qc.maximum,qc.minimum);
		return -ERANGE;
	}

	switch (ctrl->id) {
	case V4L2_CID_GAIN:
		return sensor_s_gain(sd, ctrl->value);
	case V4L2_CID_EXPOSURE:
		return sensor_s_exp(sd, ctrl->value);
	}
	return -EINVAL;
}


static int sensor_g_chip_ident(struct v4l2_subdev *sd,
    struct v4l2_dbg_chip_ident *chip)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SENSOR, 0);
}


/* ----------------------------------------------------------------------- */

static const struct v4l2_subdev_core_ops sensor_core_ops = {
	.g_chip_ident = sensor_g_chip_ident,
	.g_ctrl = sensor_g_ctrl,
	.s_ctrl = sensor_s_ctrl,
	.queryctrl = sensor_queryctrl,
	.reset = sensor_reset,
	.init = sensor_init,
	.s_power = sensor_power,
	.ioctl = sensor_ioctl,
};

static const struct v4l2_subdev_video_ops sensor_video_ops = {
	.enum_mbus_fmt = sensor_enum_fmt,
	.enum_framesizes = sensor_enum_size,
	.try_mbus_fmt = sensor_try_fmt,
	.s_mbus_fmt = sensor_s_fmt,
	.s_parm = sensor_s_parm,
	.g_parm = sensor_g_parm,
	.g_mbus_config = sensor_g_mbus_config,
};

static const struct v4l2_subdev_ops sensor_ops = {
	.core = &sensor_core_ops,
	.video = &sensor_video_ops,
};

/* ----------------------------------------------------------------------- */
static struct cci_driver cci_drv = {
	.name = SENSOR_NAME,
	.addr_width = CCI_BITS_16,
	.data_width = CCI_BITS_8,
};

static int sensor_probe(struct i2c_client *client,
      const struct i2c_device_id *id)
{
	struct v4l2_subdev *sd;
	struct sensor_info *info;
	info = kzalloc(sizeof(struct sensor_info), GFP_KERNEL);
	if (info == NULL)
		return -ENOMEM;
	sd = &info->sd;
	glb_sd = sd;
	cci_dev_probe_helper(sd, client, &sensor_ops, &cci_drv);

	info->fmt = &sensor_formats[0];
	info->af_first_flag = 1;
	info->init_first_flag = 1;

	return 0;
}
static int sensor_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd;
	sd = cci_dev_remove_helper(client, &cci_drv);
	kfree(to_state(sd));
	return 0;
}

static const struct i2c_device_id sensor_id[] = {
	{SENSOR_NAME, 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, sensor_id);


static struct i2c_driver sensor_driver = {
	.driver = {
		.owner = THIS_MODULE,
		.name = SENSOR_NAME,
	},
	.probe = sensor_probe,
	.remove = sensor_remove,
	.id_table = sensor_id,
};
static __init int init_sensor(void)
{
	return cci_dev_init_helper(&sensor_driver);
}

static __exit void exit_sensor(void)
{
	cci_dev_exit_helper(&sensor_driver);
}

module_init(init_sensor);
module_exit(exit_sensor);

